Add '/mobile' to url on mobile device - .htaccess

Question

I am trying to come up with an htaccess code that will allow me to redirect users on all mobile devices going to webpage that begins with www.example.com/blog or example.com/blog to specific page - pretty much the same link with the following extension: /mobile.
so that websites for mobile devices become:
www.example.com/blog -> www.example.com/blog/mobile
example.com/blog -> example.com/blog/mobile
How can I do that?

Answer 1

You can place this rule in your site root .htaccess:
RewriteEngine On
RewriteCond %{HTTP:x-wap-profile} !^$ [OR]
RewriteCond %{HTTP:Profile} !^$
RewriteRule ^blog/?$ /$0/mobile [L,NC,R=302]
This is assuming you don't have a .htaccess inside blog/ directory.
If you already have a blog/.htaccess then use this rule in blog/.htaccess
RewriteEngine On
RewriteCond %{HTTP:x-wap-profile} !^$ [OR]
RewriteCond %{HTTP:Profile} !^$
RewriteRule ^/?$ /blog/mobile [L,R=302]
If above header don't work then use user agent based checks:
RewriteCond %{HTTP_ACCEPT} "text\/vnd\.wap\.wml|application\/vnd\.wap\.xhtml\+xml" [NC,OR]
RewriteCond %{HTTP_USER_AGENT} "sony|symbian|nokia|samsung|mobile|windows ce|epoc|opera" [NC,OR]
RewriteCond %{HTTP_USER_AGENT} "mini|nitro|j2me|midp-|cldc-|netfront|mot|up\.browser|up\.link|audiovox"[NC,OR]
RewriteCond %{HTTP_USER_AGENT} "blackberry|ericsson,|panasonic|philips|sanyo|sharp|sie-"[NC,OR]
RewriteCond %{HTTP_USER_AGENT} "portalmmm|blazer|avantgo|danger|palm|series60|palmsource|pocketpc"[NC,OR]
RewriteCond %{HTTP_USER_AGENT} "smartphone|rover|ipaq|au-mic,|alcatel|ericy|vodafone\/|wap1\.|wap2\.|iPhone|android"[NC]
RewriteRule ^blog/?$ /$0/mobile [L,NC,R=302]